Aec lamp



(No Model.) 3 Sheets-Sheet 1.

G. G, PYLE.

ARC LAMP.-

No. 422,446. Patented Mar. 4. 1890.

BYIMZIS'SES.

3 Sheets-Sheet 2.

(No Model.)

G. (LIPYLE.

ARC LAMP.

BIO-"422,446. Patented Mar. 4, 1890.

N, PETERS Mliho nphcr, Wailvington. D. (L

(No Model.)

38heets-Sheet 3. G. 0. PYLE.

ARC LAMP.

Patented Mar. 4, 1890.

mlmllll "mum. m.

WXW

U ITED STATES PATENT OFFICE.

GEORGE C. PYLE, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NATIONAL ELECTRIC HEAD LIGHT COMPANY, OF SAME PLACE.

ARC L AM P.

SPECIFICATION forming part of Letters Patent No. 422,446, dated March 4, 1890.

Application filed May 28, 1889. Serial No. 312,451. (No model.)

To all whom it may concern. rying the lower carbon; D, the shaft of the Be it known that I, GEORGE C. PYLE, a citigearing by which the movement of said carzen of the United States, residing at Indianrying-frames is effected; E, a clutch-wheel on apolis, in the county of Marion and State of said shafts by which said movement is regu- 5 Indiana, have invented certain new and uselated; F, the coil of the solenoid bywhich ful Improvements in Electric-Arc Lamps,. of the mechanism is governed; G, an arm pivwhich the following is a specification. oted on the shaft D and carrying the brake My said invention, while it relates to elecand clutch which engage with the wheel E, trlc-arc lamps generally, is particularly deand which is also attached to and governed IO signed for use in connection with those emby the core of the solenoid; H, a guide by I ployed with locomotive electric head-lights. which the points of the carbons are held at It consists in certain details of construcall times in proper relation; I and J, the intion and arrangements of parts whereby an coming and outgoing line-wires, and K K the even and regular feed of the carbons is maincarbons.

I5 tained, whereby said carbons are firmly sup The frame A is mounted in a base A and ported in proper relation, whereby an equal should be formed of brass or some other diaresistance is maintained in said carbons notmagnetic material. It is made adjustable withstanding their varying lengths, and vertically in its bearings in said base by whereby the lamp is enabled to withstand means of lever A operated by a screw a 20 sudden shocks without disarrangement of the which is pivoted to a boss on the base and mechanism or varying the intensity of the extends through the side of its upright part light, all as will be hereinafter more particuto beneath the lower end of the frame A, larly described and claimed. where it fits into a notch in said frame and Referring to the accompanying drawings, thus holds it from turning in its bearings.

25 which are made a part hereof, and on which set-screw A is provided, by which, when the similar letters of reference indicate similar desired adjustment is effected, the frame can parts, Figure 1 is a side elevation of a lamp embe secured rigidly to position. Said frame is bodying my said invention; Fig. 2, a rear eleprovided with bearings for the carbon-carry 8o vation of the same; Fig. 3, a vertical sectional ing frames B and C, as well as for the mech- 30 view looking toward the left from the dotted anism by which they are operated. An arm line 3 3 in Fig 1; Fig. 4, a similar view look- F on said frame carries the said solenoid F 1 ing toward the right from the dotted line 4 4; and binding-posts a for the incoming and out- Fig. 5, a similar view looking toward the left going line-wires I and J 5 from the dotted line 5 5; Fig. 6, a similar view The carbon-carrying frame B consists of a 5 looking toward the right from the dotted line rod (which is preferably hollow to secure 6 6, and particularly showing the guide for lightness) wit-hacrossarm B'on its upper end, the carbons; Fig. 7, a top or plan View of the which extends out and carries the carbon, lamp; Fig. 8, a horizontal sectional View, on which cross-arn1 is formed with an enlarged an enlarged scale, looking downwardly from end I) on the opposite side to the carbon,

0 the dotted line 8 8 in Fig. 1; Fig. 9, a similar which serves as a counter-balance therefor. view looking upwardly from the dotted line Its vertical portion is mounted in a corre- 9 9, but diverging to include the armG, as sponding bearing in frame A, and is pro indicated in Fig. 2; Fig. 10, a horizontal secvided with a rack-bar b on one side, with tional view through one of the carbons and which wheel I on the shaft D engages, where- 45 its guide on the dotted line 10 10 in Fig. 6, by it is operated. The end which carries the and Fig. 11 a View of the clutch and brake carbon is formed in a separate piece and inmechanism separately, as seen from the dotsulated from the other portion of the crossted line 11 11 in Fig. 1, the adjacent parts arm,(see Fig. 1,) and is providedwitha clamp 1w being shown in dotted lines. B by which the carbon is held, which clamp 50 In said drawings the portions marked A is preferably operated by a thumb-screw b represent the frame of the lamp; B, the frame A stop a prevents this frame from descenda carrying the upper carbon; C, the frame car ing too far, either when there are no carbons in the lamp or the carbons have been burned to their practicable limit.

The frame C is very similar to the frame B, except that it is placed in a reverse position, and is geared to move in operation only about half as fast as said frame B, as is common in lamps of this character.

The shaft D is mounted in bearings in the frame A and carries the clutch-wheel E. It also carries small pinions (Z and (1 which engage with the rack-bars on the frames B and C.

The wheel E, as shown most plainly in Fig. 8, is a combined friction and clutch wheel, and is operated (as will be presently described) by the solenoid through the medium of the brake and clutch attached thereto. Its operation will be described in connection with the operation of said brake and clutch.

The coil F and the core F compose an ordinary solenoid, so far as its general c011- struction is concerned, and it is operated by the variation in the electric current in an ordinary and well-known manner. Said core is connected to the clutch and brake mechanism by a pivoted bar A on the frame A and appropriate connecting rods f f attached to its ends.

The arm G is pivoted at its inner end on the shaft D. To an arm g on one side is secu red the eonnecting-rodf by which through the bar A" it is connected to the core of the solenoid. To its extreme outer end is secured the clutch-bar G, and to a projection is secured the brake G The clutch-bar G extends up alongside the wheel E, and has a curved end which rests on a small roller a, which is mounted on a stud-shaft A on the frame A. About midway its length it is provided with a clutch pin or pawl g, which engages with the teeth on the clutch-wheel E. It is held into contact with the roller a or the surface of the wheel E, according to its location, by a small spring .9. The face of the brake G should be armed with a piece of leather or other fabric which will adhere to the surface of the wheel when in contact therewith and retard its motion. An arm A, which projects out from the frame A, supports this mechanism when not sustained by the force of the solenoid, and a spring G, attached to the brake G not only holds this brake in contact with the periphery of the wheel E, but also holds the brake and clutch mechanism so that it rests. upon the arm A" when not raised by the action of the solenoid. The curvature of the inner end of the clutchbar G is such that when it is held down in this position said inner end will be raised sufficiently by its contact with the roller a so that clutch-pin g will be above the points of the teeth of the clutch-wheel, thus permitting said clutch-wheel to revolve without obstruction from such clutclrpin. \Vhen, however, the solenoid is energized by the increase of the electric current passing through it, its core is drawn down in the ordinary manner,

bringing the clutch-pin 9 into contact with a tooth of said wheel and preventing its further rotation. In practice the current passing through the coil of the solenoid is just strong enough, when the carbons are in proper relation, to hold the clutch parts into engagement, but when the carbons are burned away the current becomes weakened, permitting the clutch mechanism to drop and disengage, and allowing the weight of the carbon-carrying frames, acting through the shaft D and gearwheels thereon, to revolve said shaft, together with the clutch-wheel, whereby the carbons are enabled to approach each other and reestablish their normal condition.

An important feature in the construction of my lamp is the balancing of parts by making the lower carbon-carrying frame and the core of such weight that the leverage on the arm G will enable them to operate as though of substantially equal weight with the upper carbon-carrying frame, so that except for the spring G the parts would remain in any position in which they might be placed.

This result is accomplished by means of the gearing which engages with the vertical portions of the carbon-carrying frames, through which gearing the weight of the core of the solenoid is enabled to operate thereon, said core being connected to said gearing through the bar A, the rod f the arm G, and the parts immediately connected therewith. When the spring G is removed, the weight of said solenoid-core holds the mechanism in such a position that the clutch-pin g is held constantly into engagement with a tooth on the wheel E, and the sizes of said wheel and the other gearing are so proportioned that when the weight of said core is thus added to the periphery of said wheel (through said wheel, the pinions, and their common shaft) the exact balancing between the two carboncarrying frames, before described, is secured. Vhen, however, the spring G is attached,it

operates against the weight of said core, raising it, relieving the wheel E and permitting the carbon-carrying frames to approach each other, except when the solenoid is energized sufficiently to counteract the force of the spring and hold the devices into engagement, as before described. Thus, except at the times when the current has operated to disengage these parts, they are exactly balanced, and no jar upon the lamp, however violent, is capable of varying the arc unless the mechanism is at the same time injured.

The guide II is held in an arm II, which is secured on the frame A by an insulated connection. It consists, substantially, of a vertical bar carryin g two loops II 11, through which the point-s of the carbons extend, between which loops said carbons come together to form the arc. Said loops are attached to said bar by an insulated connection, and are also preferably covered with an insulating preparation, as well as that portion of the bar adjacent to them. In the point of each loop is an anti-friction roller h, against which one side of the carbon rests, and between the arms of said loops, opposite to said rollers, are small springs h, which hold them in contact therewith. Said guide may be Varied in its vertical position, as it is held upon the arm H by a clamp H having a clamp-screw H The wires I and J are the ordinary outgoing and incoming line-wires. The extensions of I J of said wires, which run from the solenoid to the carbons, are connected to said carbons through the loops I-PI-I instead of to the upper and lower carbon-carrying frames, as is common. By this means exactly the same amount of resistance is maintained at all times, sofar as the carbons are concerned, as the current enters them always at a uniform distance from their points.

The carbons K K are ordinary carbons for the purpose, such as are commonly used in electric-arc lamps.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in an eleetric-arclamp, of upper and lower carbon-carrying frames arranged to feed toward each other, interposed gearing engaging with both frames, a clutch-wheel mounted on the same shaft as said gearing, a clutch-arm pivoted on said shaft, a solenoid,a pivoted lever and connec tions extending thereto from said solenoid and said clutch-arm, and a spring operating to oppose the force of the solenoid, substantially as set forth.

2. .The combination, in an electric-arc lamp, of a combined clutch and friction-wheel, an

arm'pivoted to the same shaft therewith and carrying both a clutch and a brake, the solenoid, and a connection between said arm and said solenoid, whereby said clutch and said brake are operated, substantially as set forth.

3. The combination, in an electric-arc lamp, of the clutch-wheel, the clutch,the spring for retracting said clutch, and an arm A, whereby the movement caused by said spring is limited, substantially as set forth.

4. The combination, in an electric-arc lamp, of the clutch-wheel, the clutch-bar having a curved end, and a roller or support extending from the frame underneath said clutch-bar, whereby as the operated, end of the clutchbar descends the contact between its curved end and said support will throw the clutch out of engagement, substantially as set forth.

5. The combination, in an electric-arc lamp, of a clutch-wheel mounted on the shaft which also carries the gearing whereby the carboncarrying frames are operated, an arm also pivoted on said shaft, a clutch pivoted to said arm, a brake also pivoted to said arm, and a solenoid bywhich the whole is operated, substantially as set forth. s

6. The combination, in an electric-arc lamp,

of the upper and lower carbon-carrying frames constructed of different weights, and arranged to feed toward and from each other, interposed feeding mechanism, and a solenoid-core connected to said mechanism, (the movement of said carbon-carrying frames being thus controlled,) said solenoid-core being made of the proper weight to balance said carboncarrying frames notwithstanding the difference in their weight, substantially as set forth.

7 The combination, in an electric-arc lamp, of the carbon-carrying frames, interposed gearing, clutch mechanism engaging with said gearing, and a solenoid the core of which is connected to said clutch mechanism by means of levers, said core being of an adjusted weight, whereby the difference in weight between said carbon-carrying frames is compensated for, substantially as set forth.

8. The combination, in a carbon-guide for electric-arc lamps, of the main bar to said guide, two arms containing loops orways for the carbons, anti-friction rollers in said loops or ways, and springs, whereby said carbons are held into contact with said rollers, sub: stantially as set forth.

9. The combination, in an electric-arc lamp, of the main frame, the upper and lower carbon-carrying frames, the mechanism for feeding said carbon-carrying frames toward and from each other, a guide-arm extending up alongside the carbons,and two guides mounted on said guide-arms, but insulated therefrom and extending out therefrom and embracing the carbons at substantially equal distances from their points, and the conductor-wires connected to said guides, substantially as set forth.

10. The combination, with an electric arc lamp, of a base embodying a socket into which the lower end. of the lamp-frame is litted and extends, a lever mounted on a pivot in ears on said base, the inner end of which extends through the side of said base below the lower end of said lamp-frame, and an adjusting-screw, whereby said lever may. be moved up and down, and the lamp-frame thus raised or lowered in relation to said base, substantially as shown and described.

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 24th day of May, A. D. 1889.

GEORGE G. PYLE. [L. s]

Witnesses:

O. BRADFORD, C. W. H. BROWN. 

